Experimental Study on Structural Performance of Prefabricated Composite Box Girder with Corrugated Webs and Steel Tube Slab

Journal article (2019)

Authors

Jun He Changsha University of Science and Technology
Yuqing Liu Tongji University
Sihao Wang Tongji University
H. Xin Steel & Composite Structures - CEG
Hongwei Chen Survey and Design Institute Co. Ltd.
Chaobo Ma Xingtai Rd. and Bridge Construction Corporation
Research Group
Steel & Composite Structures (CEG) (TU Delft)
Corrugated steel web Composite bridge Calibration load test Dynamic load test Load-carrying capacity Prefabricated girder Steel tube slab
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Published Date

2019

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Engineering Structures

Research Group

Steel & Composite Structures

Abstract

We present an innovative prefabricated composite box girder with corrugated webs and concrete-filled steel tube slab to prevent cracking in the web and reduce the self-weight, which is suitable for long-span structures. We carried out systematic experimental and analytical studies to investigate the structural performance, including the loading capacity and dynamic properties of a prefabricated composite box girder bridge before and after erection. Firstly, we tested a prefabricated composite girder with a single box section before erection under monotonic loading, measuring vertical deformation, flexural strain on the slabs, and shear strain on the corrugated steel webs, and evaluating the load-carrying capacity and stiffness reduction. Secondly, we conducted field live-load tests, including a calibration test and a dynamic test, on a composite bridge with twin prefabricated box girders. We hired four-axle heavy trucks for a calibration test to explore the static responses in terms of displacement, bending strain on the slabs, and shear strain on the corrugated steel webs. In the dynamic tests, we carried out a modal test using ambient vibration method and a moving load test in order to determine the dynamic behavior, which involves natural frequencies, the mode shapes, and the dynamic load factor (DLF). Based on the test results, the structural performance was evaluated by the AASHTO bridge rating process. All the findings from the load-carrying capacity test at ultimate state, calibration and dynamic load tests at service state in this study may provide a reference for the design and construction of such type of bridges.